Floodlight



June 25, 1929. H. P. HOLLNAGEL FLOODLIGHT Filed D60. 8, 1925 Inventor;-/1'erbef-Z: PHO/Magd #tto/"Ney 'a fountain the glass is vvery li .rimes.im 25, `1929.

UNITED `STATES PATENTf OFFICE.

HERBERT l. HOLLNAGEL, 0F SW-AIPBCOTT, IASSACHUBEITS, ASSIGNOBTO Gm nrIELEGTBIC COMPANY, A CORPORATION' 0l' NEW YORK.

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applicativa mea ummm s, 192s. semi no. 74,155;

My invention relates to improvements in Hood lights. More particularlythe invention relates to Hood li hts in which the character of the beamis canged-by causing it to pass through suitable means such as so-calledcolor or absorbing screens.

My invention is particularly adapted for use in the illumination offountains, for example. p Ordinarily the glass door of a Hoodlightingjdevice becomes quite hot when the light is turned on. While inthis condition, ifeold water is allowed to fall ulpon it as from ely tocrack. This is particularly true in the case of colored glass. It is oneof the objects of my. invention toprovide a Hood lighting device freefrom this objection. It is an object to provide a Hood lighting deviceYof the kind described in which instead of the usual Hat or upwardlybulging'or convex gllass a concave g lass is arran ed to receive an holdwater so t at if the lig t is turned on before the fountain water beginsto fall the glass will not become overheated.

The invention will be more fully understood from the followingspecification and by reference to the accompanying drawing in which Fig.1 is an elevation of a section of the Hood lighting unit of in?invention; Fig. 2 is a perspective drawing o the color screen withportions broken ofi to more clearly illustrate Vthe construction; Fig. 3is a section through the color screen. Y,

Referring more in detail to the drawing, it will be seen that the Hoodlight comprises a reflecting element 2 which may be a surface ofrevolution of any suitable form, such as parabolidal, heperbolidal, orthe like. This re- Hector may supported in any suitable mann'er. Uponthe rim of the reflector there is supported an annular frame 3 uponwhich rests a concave transparent or translucent glass closure 4 adaptedto serve as a basin for a volume of water 5. ThisA glass 4 and the water5 form a composite lens. Below this lens andl located within the focalregion of the reflector 2 there is located a source of light v 1 whichmay be of any suitable character such mayl be modified by merely havingthe composite lens 4 and 5. The screen 6 ma Abe either transparent ortranslucent. 'ly'his screen is of a suitable character. The rays oflight emanating from the device will ass through the `screen and emergethererom with a spectral composition and ene distribution quitedifferent from that originally emitted from the incandescent filament.

By referring to Figs. 2 and 3 it will be Seen that the screen consistsof a pair of glass plates I and 9 holding between them a layer ofcolored transparent material8 which acts not only as a screen for thelight, but may serve also as an adhesive to firmly hold the two glassplatesv together. Under heat-and p ressure the glass plates andthecolored medium ma vbecome practically inte l with one anot er.- Thisconstruction, owever,

absorbing material laid between the two sheets of glass after `which theedges of glass may be covered with a `coat of water-proof material 10 toprevent the disintegration of thecolor absorbing substance. As aAwater-.proofing material, rubber, bakelite,'collasta, marine luetar andthe like may be used. It will understood that the color screen mayconsist of a number of Yunits similar to that shown in Fig. 2 placed oneu n the other. These units when constru asdescribed `are very strong. Y

As a base for the color absorbing medium,

bakelite, collasta, urea-resin or any condensation roduct which hasbeen` pro may utilized. Gelatine or uloee oompoilnds may also beutilized. f

lines 11v water falling from afountain, for example. As the 'waterimpinges upon the screen 6 it Hows 0H and trickles into the con cavebasin 4. In order to insure thatA the water shall How from the screeninto the basin the holder of the scr n is provided with a Han e 12. Inthe marginal region of the holcr a series of openings 13 only one ofwhich is shown, is provided. erefore, as the water runs ot of the screenit passes through the openings 13 into the basin as indicated in Fig. 1,by the stream 14. After the water has once collected in the glass 4 thesource of liglrt may be allowed to run even before the fountain isturned on without much danger of either the lass 4 or the glass lates 7and 9 being bro en by the cold water alling upon it.

ly dried Fig. 1v I have represented by the dotted i of the invention orfrom the scope of the- With the arrangement described very little heatwill pass through to the plates of the color screen. The same is truewith respect to the ultra-violet rays. This is due to the fact that thewater 5 absorbs the energy from both the infra-red and ultra-violetregions of the spectrum. More particularly is this true of that portionof the infra-red region of the spectrum in which the resulting energyeffects are a maximum.

While I have illustrated my invention in connection with a specific formof device in compliance with the requirements of the patent statutes, itWill be understood that. in view of the disclosure, variations may bereadily carried out without departing from the spirit claims herein.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is: v

1. A lood light comprising a light source, a housing for the lightsource, an opening in said housing over the light source, a transarentbasin located in said opening for holding water and for allowing lightfrom the light source to pass through, a color screen llocated over saidbasin for coloring the light that passes through said basin, said Screenelements being all assembled in order along a common axis whereby when alight source is located in front of the reiector a beam may be projectedfrom the reflector thro h said container and said screen and wheiiegbthe screen may be protected from damage ue to heat from the lightsource.

In witness whereof, I have hereunto set my hand this thirtieth day ofNovember, 1925.

HERBERT P. HOLLNAGEL.

